Free precession and transverse relaxation of hyperpolarized 129Xe gas detected by SQUIDs in ultra-low magnetic fields
作者： W. Kilian , A. Haller , F. Seifert , D. Grosenick , H. Rinneberg
DOI: 10.1140/EPJD/E2007-00026-8
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摘要: We studied the free precession of nuclear magnetization hyperpolarized 129Xe gas in external magnetic fields as low B0 = 4.5 nT, using SQUIDs flux detectors. The transverse relaxation was mainly caused by restricted diffusion 129Xe presence ambient field gradients. Its pressure dependence measured range from 30 mbar to 850 mbar and compared quantitatively theory. Motional narrowing observed at pressure, yielding relaxation times up 8000 s.
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